H01J 3/00
Details of electron-optical or ion-optical arrangements common to two or more basic
Official title: Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps
H01J3/00 (Details of electron-optical or ion-optical arrangements common to two or more basic) appears on 1,406 US grants and 890 published applications in this corpus.
Search patents in H01J- Granted patents
- 1,406
- Published applications
- 890
- Assignees
- 505
- Inventors
- 2,234
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 11 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 9 | 0 |
| 1987 | 17 | 0 |
| 1988 | 15 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 22 | 0 |
| 1992 | 22 | 0 |
| 1993 | 26 | 0 |
| 1994 | 25 | 0 |
| 1995 | 25 | 0 |
| 1996 | 47 | 0 |
| 1997 | 40 | 0 |
| 1998 | 71 | 0 |
| 1999 | 83 | 0 |
| 2000 | 66 | 0 |
| 2001 | 47 | 13 |
| 2002 | 57 | 51 |
| 2003 | 53 | 44 |
| 2004 | 42 | 53 |
| 2005 | 37 | 76 |
| 2006 | 39 | 63 |
| 2007 | 33 | 50 |
| 2008 | 38 | 21 |
| 2009 | 37 | 32 |
| 2010 | 29 | 41 |
| 2011 | 34 | 36 |
| 2012 | 33 | 34 |
| 2013 | 36 | 78 |
| 2014 | 57 | 51 |
| 2015 | 51 | 36 |
| 2016 | 41 | 28 |
| 2017 | 35 | 25 |
| 2018 | 19 | 14 |
| 2019 | 21 | 25 |
| 2020 | 26 | 21 |
| 2021 | 19 | 23 |
| 2022 | 21 | 15 |
| 2023 | 8 | 20 |
| 2024 | 15 | 14 |
| 2025 | 23 | 16 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 3/02Electron guns1,105
- H01J 3/14Arrangements for focusing or reflecting ray or beam145
- H01J 3/26Arrangements for deflecting ray or beam67
- H01J 3/04Ion guns54
- H01J 3/40Arrangements for removing or diverting unwanted particles30
- H01J 3/12Arrangements for controlling cross-section of ray or beam26
- H01J 3/38Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements23
- H01J 3/08Arrangements for controlling intensity of ray or beam13
All 12 subgroupsShow fewer
Recent patents
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- Filament alignment device21 Apr 2026US 12,609,281 B2Samsung Electronics Co., Ltd.
- Mounted planar filament31 Mar 2026US 12,592,355 B2Moxtek, Inc.
- Emitter and device comprising same24 Mar 2026US 12,586,747 B2Denka Company Limited
- Arc flash mitigation device24 Feb 2026US 12,562,559 B2Eaton Intelligent Power Limited
- Apparatus for generating ions10 Sep 2026US 2026/0269205 A1Thermo Fisher Scientific (Bremen) GmbH
- Transport Package for Charged Particle Gun and Maintenance Method for Charged Particle Gun20 Aug 2026US 2026/0245824 A1Hitachi High-Tech Corporation
- Field emission source for ion mobility spectrometry23 Jul 2026US 2026/0210910 A1Verily Life Sciences LLC
- Electron emission source18 Jun 2026US 2026/0171342 A1Infovion Inc.
- Arc flash mitigation device4 Jun 2026US 2026/0155644 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Split collector vacuum field effect transistor357US 5,012,153 A1991
- Vertical microelectronic field emission devices312US 5,475,280 AMcnc · 1995
- Cylindrical electron beam generating/triggering device and method for generation of electrons228US 7,122,949 B2Neocera, Inc. · 2006
- Electron emission device215US 4,904,895 ACanon Kabushiki Kaisha · 1990
- Energy conversion using high charge density194US 5,018,180 AJupiter Toy Company · 1991